ColdPruf Men's Authentic Dual Layer Wool Plus Base Layer Bottom Inside -100% Cotton, Outside - 50% Cotton, 40% Merino Wool, 10% Nylon Imported Two-layer engineering with Merino Wool, traps body heat between layers, resulting in chill-blocking warmth Pant sits at natural waistline. Front and back rise provides an exceptionally comfortable fit and maintains coverage during various activities Tagless labeling, non-itch waistband and gussets for added durability and comfortable fit Convenient functioning front fly Perfect as a base layer. Best for dressing with minimal layers in extreme cold and low to medium activity levels. For best fit, wash before wearing